CN109378579A - A kind of filtering type slot antenna - Google Patents
A kind of filtering type slot antenna Download PDFInfo
- Publication number
- CN109378579A CN109378579A CN201811195039.8A CN201811195039A CN109378579A CN 109378579 A CN109378579 A CN 109378579A CN 201811195039 A CN201811195039 A CN 201811195039A CN 109378579 A CN109378579 A CN 109378579A
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- Prior art keywords
- sub
- gap
- minor matters
- slot antenna
- type slot
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
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Abstract
The present invention relates to a kind of filtering type slot antenna, including dielectric-slab, input port, microstrip line, half wave line resonator, minor matters of opening a way, the gaps on defect grounding structure and ground plane；Input port is set on dielectric-slab, gap is divided into the first sub- gap and the second sub- gap, microstrip line is set to the bottom of dielectric-slab, resonance frequency is generated by the half wave line resonator loaded on the second sub- gap, obtain two-band filtering characteristic, and open circuit minor matters are placed on half wave line resonator, increase the response frequency of input port；Gap on ground plane is used for radiated electromagnetic wave.And it is loaded with defect grounding structure on input port, enhances the electromagnetic coupling of input port.Using the above-mentioned filtering type slot antenna by half wave line resonator and antenna integrated structure so that when impedance matching in antenna frequency band, filtering type slot antenna it is smaller, and realize the effect for reducing return loss.
Description
Technical field
The present invention relates to fields of communication technology, and in particular to a kind of filtering type slot antenna.
Background technique
With making rapid progress for scientific technological advance, scientific and technological development has driven the development of wireless communication technique, people couple
The requirement of radio communication quality is higher and higher, and modern wireless communication systems are toward miniaturization, from very long before external
The built-in antenna of antenna till now wirelessly communicates toward intelligent development, to keep wireless telecommunication system smaller, and has good
Good filtering characteristic, it is necessary to combine antenna with filter unit, the filter antenna constituted in this way has better filtering characteristic
With radiation characteristic.
In existing filter antenna, filter unit is to separate design with radiating element, then reuses characteristic impedance
Impedance matching is carried out to it, then filter unit and radiating element are linked together and constitute filter antenna, this filter antenna
The disadvantage is that impedance mismatch, the return loss of the input terminal of circuit increases, and also will affect the filtering characteristic of filter antenna, and destroy
Gain response.To solve this problem, it joined impedance matching device in existing technology, although making filter antenna input port
Reference impedance matching degree it is higher, but due to adding additional impedance matching device, increase the volume of communication system, this
The filter quality of sample filter antenna can reduce, and return loss also will increase.
Summary of the invention
In view of this, being it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of filtering type slot antenna
When being able to solve the impedance matching in antenna frequency band, the size of filtering type slot antenna is big, the big problem of return loss.
In order to achieve the above object, the present invention adopts the following technical scheme: a kind of filtering type slot antenna, comprising: dielectric-slab,
Input port, microstrip line, half wave line resonator, minor matters of opening a way, the gap on defect grounding structure and ground plane；
The input port is set on the dielectric-slab；The microstrip line is set to the bottom of the dielectric-slab, and institute
Input port load is stated on the microstrip line；
Gap on the ground plane is divided into the first sub- gap and the second sub- gap, the half wave line resonator load
On the described first sub- gap and the described second sub- gap, for generating resonance frequency, two-band filtering characteristic is obtained；
The open circuit minor matters and the half wave line resonator interconnection, for increasing the response frequency of the input port
Rate；
The defect grounding structure load makes the filtering type slot antenna generate defect ground connection on the input port
Feeding classification reduce the return loss of the filtering type slot antenna for enhancing the coupling of the input port electromagnetism；
Gap on the ground plane is used for radiated electromagnetic wave.
Optionally, the open circuit minor matters are divided into the sub- minor matters of the first open circuit and the second sub- minor matters of open circuit:
The sub- minor matters of first open circuit are vertical with the side at the intermediate position of the half wave line resonator to be connected, and described the
The two sub- minor matters of open circuit are vertical with the other side at the intermediate position of the half wave line resonator to be connected；
The sub- minor matters of first open circuit are connected with the sub- minor matters of second open circuit, constitute quatrter-wavelength line resonator.
Optionally, the resonance frequency that the half wave line resonator generates is two resonance frequencies, respectively the first resonance
Frequency and the second resonance frequency.
Optionally, the frequency size of first resonance frequency and second resonance frequency is unequal.
Optionally, quatrter-wavelength line resonator load is on the gap of the ground plane, for generating the
Three resonance frequencies.
Optionally, the sub- minor matters of first open circuit and the length of the sub- minor matters of second open circuit are unequal.
Optionally, the described first sub- interstitial water is opened flat slot on ground plane, and is located at the side of open circuit minor matters；Described
Two sub- gaps are slotted vertically on ground plane, and are located at the other side of open circuit minor matters.
Optionally, the shape in the described first sub- gap and the described second sub- gap is rectangle.
Optionally, the length in the described first sub- gap and the second sub- gap is half-wavelength.
Optionally, the defect grounding structure is aperiodic lattice structure of the etching on the dielectric-slab.
Technical solution provided by the present application can include the following benefits:
Half wave line resonator in the application by load on gap generates resonance frequency, and it is special to obtain two-band filtering
Property, and the setting open circuit minor matters on half wave line resonator, increase the response frequency of input port；Simultaneously on ground plane
Gap is divided into the first sub- gap and the second sub- gap, is used for radiated electromagnetic wave, and the input port loaded on the microstrip line is set
It is placed on the dielectric-slab, and is loaded with defect grounding structure, enhance the electromagnetic coupling of input port.Using above-mentioned by half
The filtering type slot antenna of wavelength line resonator and antenna integrated structure does not have to additional increase impedance matching structure, makes
Filtering type slot antenna it is smaller, and when impedance matching in antenna frequency band, also achieve and reduce return loss
Effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram for filter aperture antenna that one embodiment of the application provides；
In Fig. 1: 1, dielectric-slab；2, input port；3, microstrip line；4, half wave line resonator；5, defect grounding structure；6,
First sub- gap；7, the second sub- gap；8, the first sub- minor matters of open circuit；9, the second sub- minor matters of open circuit.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Fig. 1 is a kind of structural schematic diagram for filter aperture antenna that the embodiment of the present invention one provides.As shown in Figure 1, this reality
Apply a kind of filtering type slot antenna provided by example, comprising: dielectric-slab 1, input port 2, microstrip line 3, half wave line resonator
4, minor matters of opening a way, the gap on defect grounding structure 5 and ground plane.Wherein, input port 2 is set on the dielectric-slab 1,
Microstrip line 3 is set on the bottom of the dielectric-slab, half wave line resonator 4 and open circuit minor matters interconnection, open circuit minor matters point
It is loaded on the input port 2 for the sub- minor matters 8 of the first open circuit and the second sub- minor matters 9 of open circuit, defect grounding structure 5, gap is set
On ground plane, the gap is divided into the first sub- gap 6 and the second sub- gap 7, and the first horizontal fluting in sub- gap 6 is flat in ground connection
On face, and it is located at the side of open circuit minor matters, fluting and is located at open circuit minor matters on ground plane vertically in the second sub- gap 7
The other side.
In the present embodiment, dielectric-slab 1 selects the material that dielectric constant is high, lossy microwave is low.Conductor should have conductivity it is high,
The features such as stability is good, moreover, to make the frequency band generated in 1-2GHz, then the dielectric-slab 1 used is for dielectric constant
2.55 dielectric-slab.During a specific implementation, input port 2 is loaded on microstrip line 3, and microstrip line 3 is by being arranged in
The microwave transmission line that plain conductor band on 1 bottom of dielectric-slab is constituted, the small in size, light-weight of microstrip line, service band be wide, can
It is high by property, manufacturing cost is low so that the effect of impedance matching is preferably realized in the reactance and load of antenna output end at work.
In the present embodiment, in the structure of filtering type slot antenna, uses half wave line resonator 4 for excitation, generate humorous
Vibration realizes filter effect, since half wave line resonator 4 has compact structure and transmission zero, so being widely used.And half
Wavelength line resonator 4 loads on the first sub- gap 6 on ground plane and the second sub- gap 7 on ground plane, for producing
Raw resonance frequency obtains two-band filtering characteristic, by λ=c/f withObtaining all-wave length λ is 133.33mm.Institute
Be 66.66mm with 1/2 wavelength, 1/4 wavelength is 33.33mm, and when half wave line resonator 4 works be equivalent to two four/
One wavelength line resonator generates a resonance frequency when each quatrter-wavelength line resonator works, that is, it is humorous to generate first
Vibration frequency and the second resonance frequency, and the frequency size of first resonance frequency and the second resonance frequency is unequal.
In the present embodiment, in order to improve impedance bandwidth, half wave line resonator 4 is used, and in order to obtain preferably
Frequency response increases open circuit minor matters in filtering type slot antenna.Minor matters interconnection open a way on half wave line resonator,
For increasing the response frequency of the input port, and minor matters of opening a way are divided into the sub- minor matters 8 of the first open circuit and the second sub- minor matters of open circuit
9, the first sub- minor matters 8 of open circuit are vertical with the intermediate position side of half wave line resonator 4 to be connect, the sub- minor matters 9 of the second open circuit and half-wave
The intermediate position other side of long line resonator 4 vertically connects, and the first sub- minor matters 8 of open circuit are opened a way sub- 9 length of minor matters not phase with second
Deng, and in filtering type slot antenna, the first sub- minor matters 8 of open circuit and the second sub- minor matters 9 of open circuit respectively open stub with it is short
Short out transversal, in the present embodiment, the electrical length of open stub and closed stub is slightly shorter than quarter-wave, and center
Frequency is slightly longer than zero, and the first sub- minor matters of open circuit are connected with the second sub- minor matters of open circuit and may make up another quarter-wave
Long line resonator generates third resonance frequency, since stub lengths are close to zero, so being provided by shared ground hole
State the main coupling of three quatrter-wavelength line resonators between any two.In the present embodiment, the half wave line resonator 4 is equivalent
At two quatrter-wavelength line resonators, for generating the preceding two stage filter of filtering type slot antenna, the first sub- branch of open circuit
Another quatrter-wavelength line resonator that section 8 and the second sub- minor matters 9 of open circuit are connected to form, generates filtering type slot antenna
The third level filtering, since filtering type slot antenna is all made of a length of excitation of half-wave in the present embodiment, and around line resonator
Current strength can reinforce, so the gain of the greatest irradiation direction of filtering type slot antenna is 5.6dB, and filtering type gap day
Line has preferable directionality.
In the present embodiment, in order to which the feeding classification for enhancing the electromagnetic coupling of input port 2 and generate defect ground connection then exists
Input port adds defect grounding structure 5, and the defect grounding structure is the resonator of three moulds, to etch on dielectric-slab
Aperiodic lattice structure.Half wave line resonator 4 is equivalent to two quatrter-wavelength line resonators, in minor matters of opening a way
Open stub uses phase inverter, and the resonator of equivalent radiated power dependent loss uses microstrip-slot line radiator, due to deviation groove band
Coupling is induction, it is contemplated that the load admittance using radiation conductance as the output end of virtual two-port network has established
Whole three-level bandpass filter topology, can lead to the problem of impedance matching, if making only to enter on conducting wire between antenna and feeder line
Ejected wave, without back wave, it is necessary to antenna and feed line impedance are exactly matched, whole power of such antenna ability absorption signal,
When the ratio infinity of standing-wave ratio, impedance mismatches completely, when the ratio of standing-wave ratio is 1, impedance exact matching, and standing-wave ratio
The ratio between antinodal point voltage and the nodal point voltage on conducting wire are represented, for determining the quality of matching performance between feeder line and antenna.
And return loss is the ratio between incident power and reflected wave powers, so increasing defect grounding structure 5 not only in input port 2
The coupling of 2 electromagnetism of input port can be enhanced, reflection wave signal can also be made to reduce, on the ground that antenna impedance mutates
Side carries out impedance matching, to reduce the return loss of filtering type slot antenna.
In the present embodiment, in order to realize filtering type slot antenna, needs to carry out the addition in gap on antenna structure, then add
The gap added is slotted on ground plane, and the gap on ground plane is divided into the first sub- gap 6 and the second sub- gap 7, half-wavelength
Line resonator 4 loads 7 on the described first sub- gap 6 and the second sub- gap, is used for radiated electromagnetic wave, generates the 4th resonance frequency
Rate obtains two-band filtering characteristic.And in the present embodiment, horizontal in the open circuit minor matters side and half-wave of slotting in the first sub- gap 6
On the connected ground plane of long line resonator 4, the second sub- gap 7 is slotted vertically in the humorous with half wave line of the open circuit minor matters other side
It shakes on the connected ground plane of device 4, and the first sub- gap 6 and fluting shape of the two sub- gaps 7 of ground on ground plane are square
Shape, length are half-wavelength.So the gap on above-mentioned ground plane can be used for radiated electromagnetic wave, the 4th resonance frequency is generated,
Present mechanics of communication miniaturization, the effect of densification are reached.
The first resonance frequency that filtering type slot antenna in the present embodiment generates, the second resonance frequency, third resonance frequency
Rate and the 4th resonance frequency are respectively positioned within the scope of 1-2GHz.
The filtering type slot antenna through this embodiment may be implemented half wave line resonator and antenna carrying out one
Bodyization design so that when impedance matching in antenna frequency band, filtering type slot antenna it is smaller, make modern communication
Technology smallerization, densification, and also achieve the effect for reducing return loss.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to the same or similar content in other embodiments.
It should be noted that in the description of the present invention, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
Refer at least two.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of filtering type slot antenna characterized by comprising dielectric-slab, input port, microstrip line, half wave line resonance
Device, minor matters of opening a way, the gap on defect grounding structure and ground plane；
The input port is set on the dielectric-slab；The microstrip line is set to the bottom of the dielectric-slab, and described defeated
Inbound port loads on the microstrip line；
Gap on the ground plane is divided into the first sub- gap and the second sub- gap, and the half wave line resonator load is in institute
It states on the first sub- gap and the second sub- gap, for generating resonance frequency, obtains two-band filtering characteristic；
The open circuit minor matters and the half wave line resonator interconnection, for increasing the response frequency of the input port；
The defect grounding structure load makes the filtering type slot antenna generate the feedback of defect ground connection on the input port
Electric mode reduces the return loss of the filtering type slot antenna for enhancing the coupling of the input port electromagnetism；
Gap on the ground plane is used for radiated electromagnetic wave.
2. filtering type slot antenna according to claim 1, which is characterized in that the open circuit minor matters are divided into the first open circuit
Minor matters and the second sub- minor matters of open circuit；
The sub- minor matters of first open circuit are vertical with the side at the intermediate position of the half wave line resonator to be connected, and described second opens
Way minor matters are vertical with the other side at the intermediate position of the half wave line resonator to be connected；
The sub- minor matters of first open circuit are connected with the sub- minor matters of second open circuit, constitute quatrter-wavelength line resonator.
3. filtering type slot antenna according to claim 1, which is characterized in that the half wave line resonator generates humorous
Vibration frequency is two resonance frequencies, respectively the first resonance frequency and the second resonance frequency.
4. filtering type slot antenna according to claim 3, which is characterized in that first resonance frequency and described second
The frequency size of resonance frequency is unequal.
5. filtering type slot antenna according to claim 2, which is characterized in that the quatrter-wavelength line resonator adds
It is loaded on the gap of the ground plane, for generating third resonance frequency.
6. filtering type slot antenna according to claim 2, which is characterized in that the first sub- minor matters of open circuit and described the
The length of the two sub- minor matters of open circuit is unequal.
7. filtering type slot antenna according to claim 1, which is characterized in that the first sub- interstitial water is opened flat slot in connecing
On ground level, and it is located at the side of open circuit minor matters；The second sub- gap is slotted vertically on ground plane, and is located at open circuit branch
The other side of section.
8. filtering type slot antenna according to claim 1, which is characterized in that the first sub- gap and second son
The shape in gap is rectangle.
9. filtering type slot antenna according to claim 1, which is characterized in that the first sub- gap and the second sub- gap
Length be half-wavelength.
10. filtering type slot antenna according to claim 1, which is characterized in that the defect grounding structure is that etching exists
Aperiodic lattice structure on the dielectric-slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195039.8A CN109378579A (en) | 2018-10-15 | 2018-10-15 | A kind of filtering type slot antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195039.8A CN109378579A (en) | 2018-10-15 | 2018-10-15 | A kind of filtering type slot antenna |
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| CN109378579A true CN109378579A (en) | 2019-02-22 |
Family
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| CN201811195039.8A Pending CN109378579A (en) | 2018-10-15 | 2018-10-15 | A kind of filtering type slot antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736442A (en) * | 2020-12-24 | 2021-04-30 | 西安邮电大学 | Filtering slot antenna with directional characteristic |
| CN113193383A (en) * | 2021-05-10 | 2021-07-30 | 南京智能高端装备产业研究院有限公司 | Plane filtering yagi antenna using absorption branch knot |
| CN113809529A (en) * | 2021-08-03 | 2021-12-17 | 北京邮电大学 | Dual-band impedance matching microstrip antenna and antenna array |
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| CN207038711U (en) * | 2017-07-03 | 2018-02-23 | 华南理工大学 | A Three-band Filter Microstrip Slot Antenna |
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| CN113193383A (en) * | 2021-05-10 | 2021-07-30 | 南京智能高端装备产业研究院有限公司 | Plane filtering yagi antenna using absorption branch knot |
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Application publication date: 20190222 |